“Dueling Pianos,” O’Brien’s Event Center, Waterville Dec. 27, Thursday, 4pm, Full Moon Guided Hike, snowshoes available to rent, 47 seats, $5, Hidden Valley Nature Center, 131 Egypt Road, Jefferson. FMI: 207-586-6752, www.hvnc.org. Dec. 28-29, Friday-Saturday, 9pm-1am, Dueling Pianos, these guys thrive on crowd participation, with entertainment […]